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2010-01-12x86-32: clean up rwsem inline asm statementsLinus Torvalds
This makes gcc use the right register names and instruction operand sizes automatically for the rwsem inline asm statements. So instead of using "(%%eax)" to specify the memory address that is the semaphore, we use "(%1)" or similar. And instead of forcing the operation to always be 32-bit, we use "%z0", taking the size from the actual semaphore data structure itself. This doesn't actually matter on x86-32, but if we want to use the same inline asm for x86-64, we'll need to have the compiler generate the proper 64-bit names for the registers (%rax instead of %eax), and if we want to use a 64-bit counter too (in order to avoid the 15-bit limit on the write counter that limits concurrent users to 32767 threads), we'll need to be able to generate instructions with "q" accesses rather than "l". Since this header currently isn't enabled on x86-64, none of that matters, but we do want to use the xadd version of the semaphores rather than have to take spinlocks to do a rwsem. The mm->mmap_sem can be heavily contended when you have lots of threads all taking page faults, and the fallback rwsem code that uses a spinlock performs abysmally badly in that case. [ hpa: modified the patch to skip size suffixes entirely when they are redundant due to register operands. ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <alpine.LFD.2.00.1001121613560.17145@localhost.localdomain> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-01-07x86: Merge asm/atomic_{32,64}.hBrian Gerst
Merge the now identical code from asm/atomic_32.h and asm/atomic_64.h into asm/atomic.h. Signed-off-by: Brian Gerst <brgerst@gmail.com> LKML-Reference: <1262883215-4034-4-git-send-email-brgerst@gmail.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-01-07x86: Sync asm/atomic_32.h and asm/atomic_64.hBrian Gerst
Prepare for merging into asm/atomic.h. Signed-off-by: Brian Gerst <brgerst@gmail.com> LKML-Reference: <1262883215-4034-3-git-send-email-brgerst@gmail.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-01-07x86: Split atomic64_t functions into seperate headersBrian Gerst
Split atomic64_t functions out into separate headers, since they will not be practical to merge between 32 and 64 bits. Signed-off-by: Brian Gerst <brgerst@gmail.com> LKML-Reference: <1262883215-4034-2-git-send-email-brgerst@gmail.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-12-30x86-64: Modify memcpy()/memset() alternatives mechanismJan Beulich
In order to avoid unnecessary chains of branches, rather than implementing memcpy()/memset()'s access to their alternative implementations via a jump, patch the (larger) original function directly. The memcpy() part of this is slightly subtle: while alternative instruction patching does itself use memcpy(), with the replacement block being less than 64-bytes in size the main loop of the original function doesn't get used for copying memcpy_c() over memcpy(), and hence we can safely write over its beginning. Also note that the CFI annotations are fine for both variants of each of the functions. Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Nick Piggin <npiggin@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <4B2BB8D30200007800026AF2@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-30x86-64: Modify copy_user_generic() alternatives mechanismJan Beulich
In order to avoid unnecessary chains of branches, rather than implementing copy_user_generic() as a function consisting of just a single (possibly patched) branch, instead properly deal with patching call instructions in the alternative instructions framework, and move the patching into the callers. As a follow-on, one could also introduce something like __EXPORT_SYMBOL_ALT() to avoid patching call sites in modules. Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Nick Piggin <npiggin@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <4B2BB8180200007800026AE7@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-30x86: Lift restriction on the location of FIX_BTMAP_*Jan Beulich
The early ioremap fixmap entries cover half (or for 32-bit non-PAE, a quarter) of a page table, yet they got uncondtitionally aligned so far to a 256-entry boundary. This is not necessary if the range of page table entries anyway falls into a single page table. This buys back, for (theoretically) 50% of all configurations (25% of all non-PAE ones), at least some of the lowmem necessarily lost with commit e621bd18958ef5dbace3129ebe17a0a475e127d9. Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <4B2BB66F0200007800026AD6@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-28x86, core: Optimize hweight32()Akinobu Mita
Optimize hweight32 by using the same technique in hweight64. The proof of this technique can be found in the commit log for f9b4192923fa6e38331e88214b1fe5fc21583fcc ("bitops: hweight() speedup"). The userspace benchmark on x86_32 showed 20% speedup with bitmap_weight() which uses hweight32 to count bits for each unsigned long on 32bit architectures. int main(void) { #define SZ (1024 * 1024 * 512) static DECLARE_BITMAP(bitmap, SZ) = { [0 ... 100] = 1, }; return bitmap_weight(bitmap, SZ); } Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1258603932-4590-1-git-send-email-akinobu.mita@gmail.com> [ only x86 sets ARCH_HAS_FAST_MULTIPLIER so we do this via the x86 tree] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-24Linux 2.6.33-rc2Linus Torvalds
2009-12-24Merge branch 'sysctl' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc-2.6 * 'sysctl' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc-2.6: SYSCTL: Add a mutex to the page_alloc zone order sysctl SYSCTL: Print binary sysctl warnings (nearly) only once
2009-12-24Merge branch 'hwpoison' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6 * 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6: HWPOISON: Add PROC_FS dependency to hwpoison injector v2
2009-12-24Merge branch 'release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (34 commits) classmate-laptop: add support for Classmate PC ACPI devices hp-wmi: Fix two memleaks acer-wmi, msi-wmi: Remove needless DMI MODULE_ALIAS dell-wmi: do not keep driver loaded on unsupported boxes wmi: Free the allocated acpi objects through wmi_get_event_data drivers/platform/x86/acerhdf.c: check BIOS information whether it begins with string of table acerhdf: add new BIOS versions acerhdf: limit modalias matching to supported toshiba_acpi: convert to seq_file asus_acpi: convert to seq_file ACPI: do not select ACPI_DOCK from ATA_ACPI sony-laptop: enumerate rfkill devices using SN06 sony-laptop: rfkill support for newer models ACPI: fix OSC regression that caused aer and pciehp not to load MAINTAINERS: add maintainer for msi-wmi driver fujitu-laptop: fix tests of acpi_evaluate_integer() return value arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c: avoid cross-CPU interrupts by using smp_call_function_any() ACPI: processor: remove _PDC object list from struct acpi_processor ACPI: processor: change acpi_processor_set_pdc() interface ACPI: processor: open code acpi_processor_cleanup_pdc ...
2009-12-24Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: ocfs2/trivial: Use le16_to_cpu for a disk value in xattr.c ocfs2/trivial: Use proper mask for 2 places in hearbeat.c Ocfs2: Let ocfs2 support fiemap for symlink and fast symlink. Ocfs2: Should ocfs2 support fiemap for S_IFDIR inode? ocfs2: Use FIEMAP_EXTENT_SHARED fiemap: Add new extent flag FIEMAP_EXTENT_SHARED ocfs2: replace u8 by __u8 in ocfs2_fs.h ocfs2: explicit declare uninitialized var in user_cluster_connect() ocfs2-devel: remove redundant OCFS2_MOUNT_POSIX_ACL check in ocfs2_get_acl_nolock() ocfs2: return -EAGAIN instead of EAGAIN in dlm ocfs2/cluster: Make fence method configurable - v2 ocfs2: Set MS_POSIXACL on remount ocfs2: Make acl use the default ocfs2: Always include ACL support
2009-12-24Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: VIDEO: cyberpro: pci_request_regions needs a persistent name ARM: dma-isa: request cascade channel after registering it ARM: footbridge: trim down old ISA rtc setup ARM: fix PAGE_KERNEL ARM: Fix wrong shared bit for CPU write buffer bug test ARM: 5857/1: ARM: dmabounce: fix build ARM: 5856/1: Fix bug of uart0 platfrom data for nuc900 ARM: 5855/1: putc support for nuc900 ARM: 5854/1: fix compiling error for NUC900 ARM: 5849/1: ARMv7: fix Oprofile events count ARM: add missing include to nwflash.c ARM: Kill CONFIG_CPU_32 ARM: Convert VFP/Crunch/XscaleCP thread_release() to exit_thread() ARM: 5853/1: ARM: Fix build break on ARM v6 and v7
2009-12-24Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bpLinus Torvalds
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: edac, pci: remove pesky debug printk amd64_edac: restrict PCI config space access amd64_edac: fix forcing module load/unload amd64_edac: make driver loading more robust amd64_edac: fix driver instance freeing amd64_edac: fix K8 chip select reporting
2009-12-24Merge branch 'sh/for-2.6.33' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 * 'sh/for-2.6.33' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: sh: Ensure all PG_dcache_dirty pages are written back. sh: mach-ecovec24: setup.c detailed correction serial: sh-sci: Convert tremaining ctrl_xxx I/O routines to __raw_xxx. serial: sh-sci: earlyprintk zero uartclk fix sh: Only use bl bit toggling for sleeping idle. sh: Restore bl bit toggling in idle loop. sh: Fix up MAX_DMA_CHANNELS definition when DMA is disabled. sh: dmaengine support for SH7785 sh: dmaengine support for sh7724.
2009-12-24VIDEO: cyberpro: pci_request_regions needs a persistent nameRussell King
Don't pass a name pointer from the kernel stack, it will not survive and will result in corrupted /proc/iomem output. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-24ARM: dma-isa: request cascade channel after registering itRussell King
We can't request the cascade channel before it's been registered, so move it afterwards. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-24ARM: footbridge: trim down old ISA rtc setupRussell King
This fixes a "start_kernel(): bug: interrupts were enabled early". rtc_cmos now takes care of initializing the ISA RTC and reading the current time and date from it; there's no need to repeat that here, thereby causing interrupts to be enabled too early. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-24ARM: fix PAGE_KERNELRussell King
PAGE_KERNEL should not be executable; any area marked executable can be prefetched into the instruction cache. We don't want vmalloc areas to be read in this way. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-24edac, pci: remove pesky debug printkBorislav Petkov
Do not spam the logs needlessly with the sole info that edac_pci_dev_parity_clear is being called. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2009-12-24amd64_edac: restrict PCI config space accessBorislav Petkov
Do not access F2x19[0,4] on K8 since they're undefined there. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2009-12-24amd64_edac: fix forcing module load/unloadBorislav Petkov
Clear the override flag after force-loading the module. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2009-12-24amd64_edac: make driver loading more robustBorislav Petkov
Currently, the module does not initialize fully when the DIMMs aren't ECC but remains still loaded. Propagate the error when no instance of the driver is properly initialized and prevent further loading. Reorganize and polish error handling in amd64_edac_init() while at it. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2009-12-24amd64_edac: fix driver instance freeingBorislav Petkov
Fix use-after-free errors by pushing all memory-freeing calls to the end of amd64_remove_one_instance(). Reported-by: Darren Jenkins <darrenrjenkins@gmail.com> LKML-Reference: <1261370306.11354.52.camel@ICE-BOX> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2009-12-24amd64_edac: fix K8 chip select reportingBorislav Petkov
Fix the case when amd64_debug_display_dimm_sizes() reports only half the amount of DRAM on it because it doesn't account for when the single DCT operates in 128-bit mode and merges chip selects from different DIMMs. Reported-by: Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de> LKML-Reference: <200912112202.48173.johannes.hirte@fem.tu-ilmenau.de> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2009-12-24Merge branch 'misc-2.6.33' into releaseLen Brown
2009-12-24Merge branch 'tc1100-wmi' into releaseLen Brown
2009-12-24Merge branch 'sony' into releaseLen Brown
2009-12-24Merge branch 'classmate' into releaseLen Brown
2009-12-24Merge branch 'pdc' into releaseLen Brown
2009-12-24Merge branches 'bugzilla-14446', 'bugzilla-14753' and 'bugzilla-14824' into ↵Len Brown
release
2009-12-24Merge branch 'osc' into releaseLen Brown
2009-12-24classmate-laptop: add support for Classmate PC ACPI devicesThadeu Lima de Souza Cascardo
This add supports for devices like keyboard, backlight, tablet and accelerometer. This work is supported by International Syst S/A. [randy.dunlap@oracle.com: cmpc_acpi: depends on ACPI] [akpm@linux-foundation.org: readability tweaks] [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-24Merge branch 'sh/g3-prep' into sh/for-2.6.33Paul Mundt
2009-12-24sh: Ensure all PG_dcache_dirty pages are written back.Markus Pietrek
With some of the cache rework an address aliasing optimization was added, but this managed to fail on certain mappings resulting in pages with PG_dcache_dirty set never writing back their dcache lines. This patch reverts to the earlier behaviour of simply always writing back when the dirty bit is set. Signed-off-by: Markus Pietrek <Markus.Pietrek@emtrion.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-12-24sh: mach-ecovec24: setup.c detailed correctionKuninori Morimoto
o remove unused define o add device name comment Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-12-24hp-wmi: Fix two memleaksThomas Renninger
Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-24serial: sh-sci: Convert tremaining ctrl_xxx I/O routines to __raw_xxx.Paul Mundt
ctrl_xxx() is an antiquated SH interface, while __raw_xxx is the standard API that accomplishes the same thing. As such, this converts the remaining sh-sci straggles over, which enables the driver to be wired up for ARM SH-Mobile CPUs as well. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-12-24serial: sh-sci: earlyprintk zero uartclk fixMagnus Damm
This establishes a sensible max baud rate for the earlyprintk cases where the port's uartclk has not yet been determined. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-12-24acer-wmi, msi-wmi: Remove needless DMI MODULE_ALIASThomas Renninger
Now that we have WMI autoloading the DMI matching is not needed anymore. Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: Carlos Corbacho <carlos@strangeworlds.co.uk> Acked-by: Anisse Astier <anisse@astier.eu> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-24dell-wmi: do not keep driver loaded on unsupported boxesDmitry Torokhov
There is no point in having the driver loaded in memory if we fail to locate particular WMI GUID. Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Acked-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-24wmi: Free the allocated acpi objects through wmi_get_event_dataAnisse Astier
These function allocate an acpi object by calling wmi_get_event_data, which then calls acpi_evaluate_object, and it is not freed afterwards. And kernel doc is fixed for parameters of wmi_get_event_data. Signed-off-by: Anisse Astier <anisse@astier.eu> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Carlos Corbacho <carlos@strangeworlds.co.uk> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-24drivers/platform/x86/acerhdf.c: check BIOS information whether it begins ↵Peter Feuerer
with string of table BIOS information is now checked whether it begins with the strings stored in the BIOS table. Previous method did a strcmp, what lead to problems if BIOS information has appended whitespaces. Signed-off-by: Peter Feuerer <peter@piie.net> Cc: Borislav Petkov <petkovbb@gmail.com> Cc: Andreas Mohr <andi@lisas.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-24acerhdf: add new BIOS versionsPeter Feuerer
Add new BIOS versions for following netbooks: Aspire 1810xx, Packard Bell DOTMU. Signed-off-by: Peter Feuerer <peter@piie.net> Cc: Borislav Petkov <petkovbb@gmail.com> Cc: Andreas Mohr <andi@lisas.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-24acerhdf: limit modalias matching to supportedStefan Bader
BugLink: https://bugs.launchpad.net/ubuntu/+bug/435958 The module alias currently matches any Acer computer but when loaded the BIOS checks will only succeed on Aspire One models. This causes a invalid BIOS warning for all other models (seen on Aspire 4810T). This is not fatal but worries users that see this message. Limiting the moule alias to models starting with AOA or DOA for Packard Bell. Signed-off-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Borislav Petkov <petkovbb@gmail.com> Acked-by: Peter Feuerer <peter@piie.net> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-24toshiba_acpi: convert to seq_fileAlexey Dobriyan
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: John W. Linville <linville@tuxdriver.com> Cc: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-24asus_acpi: convert to seq_fileAlexey Dobriyan
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Corentin Chary <corentincj@iksaif.net> Cc: Karol Kozimor <sziwan@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-24ACPI: do not select ACPI_DOCK from ATA_ACPICarlos R. Mafra
In March 2008 commit 0ac4a3c2fbbcadc3e96e4dc47d4ae802d66e6f67 ("ACPI: fix ATA_ACPI build") made CONFIG_ACPI_DOCK be selected by CONFIG_ATA_ACPI because of a build error when CONFIG_ATA_ACPI=y and CONFIG_ACPI_DOCK=m. However, in September 2008 commit 898b054f3eec5921320ae8614b5bdd7b07ea5b43 ("dock: make dock driver not a module") removed the possibility of having CONFIG_ACPI_DOCK=m and therefore there is no need for selecting it when CONFIG_ATA_ACPI=y. This makes the kernel ~5 Kb smaller for people who don't have a dock by allowing them to not have ACPI_DOCK compiled-in because of ATA_ACPI=y. Signed-off-by: Carlos R. Mafra <crmafra@aei.mpg.de> Cc: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-23sony-laptop: enumerate rfkill devices using SN06Mattia Dongili
SN06 makes sure we get back a longer buffer which seems to be necessary going forward as the SNC devices describes more and more devices (or features more precisely). Moreover SN06 should be called with only the descriptor offset to make sure we hit the rfkill controlling function (F124 or F135) with a 0 argument to get a full list of features. Signed-off-by: Mattia Dongili <malattia@linux.it> Tested-by: Miguel Rodríguez Pérez <miguelrp@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
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